You may want to cut back more on your mince. Slowly, to 1/2 cup a day. You may have to give 1/4 cup in the A.M. and again in the P.M. The meaty bones I would continue with for now.
Physical exercise done with you, can help build her muscle and tighten the skin alittle, tire her out at least once a day, both mentally, and physically, and she may not beg for food as often otherwize.
Good luck, like with people it is harder to take it off then it is to put it on!
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And here is another one, "My dogs aren't spoiled, we are just well trained!"